defense of the Prophet's integrity

أَفْتَرَىٰ عَلَى ٱللَّهِ كَذِبًا أَم بِهِۦ جِنَّةٌۢ ۗ بَلِ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْـَٔاخِرَةِ فِى ٱلْعَذَابِ وَٱلضَّلَـٰلِ ٱلْبَعِيدِ

Has he invented about Allāh a lie or is there in him madness?" Rather, they who do not believe in the Hereafter will be in the punishment and [are in] extreme error.

وَمَا صَاحِبُكُم بِمَجْنُونٍ

And your companion [i.e., Prophet Muḥammad (ﷺ) ] is not [at all] mad.